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Goodwill - Additional Information (Details)
$ in Thousands
12 Months Ended
May 31, 2021
USD ($)
May 31, 2020
USD ($)
May 31, 2020
CAD ($)
Goodwill [Line Items]      
Business acquisition, goodwill, expected deductible for income tax purposes $ 0    
CannInvest Africa Ltd. | COVID-19      
Goodwill [Line Items]      
Goodwill, impairment charges $ 0 $ 3,581,000 $ 4,800
Goodwill impairment discount rate   38.50% 38.50%
ABP, S.A. | COVID-19      
Goodwill [Line Items]      
Goodwill, impairment charges   $ 3,730,000 $ 5,000
Goodwill impairment discount rate   23.30% 23.30%
Marigold | COVID-19      
Goodwill [Line Items]      
Goodwill, impairment charges   $ 14,301,000 $ 19,171
Goodwill impairment discount rate   38.50% 38.50%
ColCanna S.A.S. | COVID-19      
Goodwill [Line Items]      
Goodwill, impairment charges   $ 29,067,000 $ 35,000
Goodwill impairment discount rate   40.00% 40.00%